Crash helmet



FIG. 1 is a front elevational view of a crash helmet showing my new design;

FIG. 2 is a side perspective view thereof;

FIG. 3 is a perspective view thereof with the visor in a raised position;

FIG. 4 is another front elevational view thereof;

FIG. 5 is a side elevational view thereof with the visor and chin protecting portion in a raised position; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a crash helmet, as shown. 